B01D 2257/404
Nitrogen oxides other than dinitrogen oxide
B01D2257/404 (Nitrogen oxides other than dinitrogen oxide) appears on 1,630 US grants and 2,270 published applications in this corpus.
Search patents in B01D- Granted patents
- 1,630
- Published applications
- 2,270
- Assignees
- 1,023
- Inventors
- 4,953
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 3 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 5 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 4 | 0 |
| 1987 | 4 | 0 |
| 1988 | 4 | 0 |
| 1989 | 1 | 0 |
| 1990 | 6 | 0 |
| 1991 | 3 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 5 | 0 |
| 1995 | 6 | 0 |
| 1996 | 8 | 0 |
| 1997 | 17 | 0 |
| 1998 | 11 | 0 |
| 1999 | 7 | 0 |
| 2000 | 20 | 0 |
| 2001 | 13 | 5 |
| 2002 | 19 | 16 |
| 2003 | 22 | 26 |
| 2004 | 15 | 22 |
| 2005 | 15 | 40 |
| 2006 | 20 | 28 |
| 2007 | 13 | 29 |
| 2008 | 22 | 58 |
| 2009 | 27 | 79 |
| 2010 | 39 | 128 |
| 2011 | 48 | 98 |
| 2012 | 83 | 100 |
| 2013 | 93 | 107 |
| 2014 | 81 | 73 |
| 2015 | 88 | 135 |
| 2016 | 75 | 117 |
| 2017 | 95 | 100 |
| 2018 | 82 | 129 |
| 2019 | 117 | 109 |
| 2020 | 102 | 114 |
| 2021 | 86 | 106 |
| 2022 | 85 | 102 |
| 2023 | 77 | 116 |
| 2024 | 67 | 167 |
| 2025 | 80 | 143 |
| 2026 | 52 | 123 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for manufacturing exhaust gas purification catalyst29 Sep 2026US 12,746,538 B2Cataler Corporation
- Photocatalyst filter and electronic device comprising same15 Sep 2026US 12,734,266 B2Samsung Electronics Co., Ltd.
- Nitrogen oxides warm up control15 Sep 2026US 12,734,480 B1GM Global Technology Operations LLC
- Selective catalytic reduction catalyst module support system and installation method15 Sep 2026US 12,736,221 B2Lummus Technology Inc.
- Nitrogen oxide removing denitrification catalyst having high durability against sulfur dioxide, method for preparing the same, and method for removing nitrogen oxide using the same8 Sep 2026US 12,728,406 B2Korea Institute of Science and Technology
- Method and device for separating a carbon dioxide-containing gas by partial condensation and/or distillation and/or solidification8 Oct 2026US 2026/0306989 A1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Exhaust purification device8 Oct 2026US 2026/0307009 A1Mazda Motor Corporation
- Modified Metal-Organic Framework (MOF) Compositions, Process of Making and Process of Use Thereof8 Oct 2026US 2026/0307047 A1NuMat Technologies, Inc.
- Method for producing fe-doped beta zeolite catalyst monoliths8 Oct 2026US 2026/0307064 A1BASF SE
- Control systems and methods for exhaust pollution mitigation1 Oct 2026US 2026/0295519 A1ECC TEC MSJ Incorporated
Most cited
By later US patents
- Methods and apparatus to generate liquid ambulatory oxygen from an oxygen concentrator136US 5,979,440 ASeQual Technologies, Inc. · 1999
- Filter and method for removing mercury, bacteria, pathogens and other vapors from gas134US 4,917,862 A1990
- Low pressure injection and turbulent mixing in selective catalytic reduction system134US 6,449,947 B1Fleetguard, Inc. · 2002
- Methods and apparatus to generate liquid ambulatory oxygen from an oxygen concentrator133US 6,698,423 B1SeQual Technologies, Inc. · 2004
- Catalyzed SCR filter and emission treatment system132US 7,229,597 B2BASFD Catalysts LLC · 2007